I've used REST in past to get data from Kentioc site but not to update anything.
From what I see the REST needs a set of data for it to tale action, as can see in examples:
(project is in version 7)
How can I provide third party with callback url "~/rest/....."
If all data after ~/rest/ has to do with KEntico objects?
Third party will be sending back some JSON.
how can I use the REST service and create a custom function to deal with incoming JSON?